<template>
  <div>
    <h2>随机点名</h2>
    <div class="box">
      <span>名字是：</span>
      <div class="qs">{{ oneName }}</div>
    </div>
    <div class="btns">
      <button class="start" @click="start">开始</button>
      <button class="end" @click="end">结束</button>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      timer: '',
      i: 0,
      heroName: ['黄忠', '赵云', '马超', '李白', '韩信', '露娜'],
      oneName: '这里显示姓名'
    }
  },
  methods: {
    start() {
      this.timer = setInterval(() => {
        if (this.i == this.heroName.length - 1) {
          this.i = 0
        }
        this.oneName = this.heroName[this.i]
        this.i++
        // console.log(i)
      }, 200)
    },
    end() {
      clearInterval(this.timer)
    }
  }
}
</script>

<style>
* {
  margin: 0;
  padding: 0;
}

h2 {
  text-align: center;
}

.box {
  width: 600px;
  margin: 50px auto;
  display: flex;
  font-size: 25px;
  line-height: 40px;
}

.qs {
  width: 450px;
  height: 40px;
  color: red;
}

.btns {
  text-align: center;
}

.btns button {
  width: 120px;
  height: 35px;
  margin: 0 50px;
}
</style>
